TY - GEN
T1 - An enhanced DFT-based channel estimation using virtual interpolation with guard bands prediction for OFDM
AU - Seo, Jeong Wook
AU - Wee, Jung Wook
AU - Jeon, Won Gi
AU - Paik, Jong Ho
AU - Kim, Dong Ku
PY - 2006
Y1 - 2006
N2 - In this paper, we investigate the conventional windowed DFT-based channel estimation for OFDM systems with guard bands. The conventional method suffers from the edge effect and the pilot position mismatch. In order to solve the problems, we propose an enhanced DFT-based channel estimation using virtual interpolation with guard bands prediction, where linear minimum mean square error (LMMSE) smoothing/prediction and circular frequency shifting are employed. This technique can efficiently mitigate the edge effect caused by the DFT of the truncated channel impulse response and compensate the pilot position mismatch that pilot symbols are not allocated at the first and the last subcarriers in a useful band. Simulation results show that the proposed method has about 5 dB SNR gain at BER=10-3 compared to the conventional method and is as good as the frequency-domain LMMSE method.
AB - In this paper, we investigate the conventional windowed DFT-based channel estimation for OFDM systems with guard bands. The conventional method suffers from the edge effect and the pilot position mismatch. In order to solve the problems, we propose an enhanced DFT-based channel estimation using virtual interpolation with guard bands prediction, where linear minimum mean square error (LMMSE) smoothing/prediction and circular frequency shifting are employed. This technique can efficiently mitigate the edge effect caused by the DFT of the truncated channel impulse response and compensate the pilot position mismatch that pilot symbols are not allocated at the first and the last subcarriers in a useful band. Simulation results show that the proposed method has about 5 dB SNR gain at BER=10-3 compared to the conventional method and is as good as the frequency-domain LMMSE method.
UR - http://www.scopus.com/inward/record.url?scp=44949134931&partnerID=8YFLogxK
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U2 - 10.1109/PIMRC.2006.254263
DO - 10.1109/PIMRC.2006.254263
M3 - Conference contribution
AN - SCOPUS:44949134931
SN - 1424403294
SN - 9781424403295
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
BT - 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
T2 - 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
Y2 - 11 September 2006 through 14 September 2006
ER -